New guy here!
I dont own a Caliber yet, but hope to soon.
I was reading this thread, and was reminded of a similiar problem I had with my '01 Ram 1500 a few years ago. (Lights acting all wonky.)
The problem was the multifunction switch in the trucks steering column, this switch controls the functions of the lights, brake lights, turn signals etc..
Does the Caliber have a similiar switch controlling the lights?
Might be worth looking into.